feature request: tg name + username in the gui

[hoverlord]

hi! it would be great if we could also enter the telegram name (and username) into the gui when entering the node ids. it would make things much clearer if telegram names are shown in the ring graph

[Czino]

I added the feature to save labels for each node in a ring. By default it will fallback to the node alias or pub key if no label is given.